A communications device for use in a wireless communications network providing a wireless access interface within a system bandwidth, the system bandwidth comprising a plurality of bandwidth parts, the communications device comprising a transmitter configured to transmit signals using a plurality of activated bandwidth parts, a receiver configured to receive signals using the plurality of activated bandwidth parts, the received signals being signals transmitted using a plurality of activated beams, and a controller configured to control the transmitter and the receiver so that the communications device is operable: to determine that an activated beam associated with a first bandwidth part satisfies beam failure criteria; to select from the plurality of activated bandwidth parts a second bandwidth part; and to transmit using communications resources associated with the selected second bandwidth part a beam failure indication indicating that the activated beam associated with the first bandwidth part satisfies the beam failure criteria.
Legal claims defining the scope of protection, as filed with the USPTO.
2. A communications device according to claim 1, wherein the beam failure criteria comprises a threshold applicable to a measured characteristic of received signals, and the communications device is operable to measure the characteristic of signals received on communications resources associated with the first bandwidth part.
3. A communications device according to claim 1, wherein one of the plurality of activated bandwidth parts is designated as a primary bandwidth part which is activated while at least one other bandwidth part is activated and the first bandwidth part is the bandwidth part designated as the primary bandwidth part.
4. A communications device according to claim 1, wherein each of the plurality of activated bandwidth parts is either a default bandwidth part having a highest activation priority or a non-default bandwidth part having a first activation priority which is lower than a second activation priority of the default bandwidth part, and the first bandwidth part is the default bandwidth part.
5. A communications device according to claim 1, wherein the first bandwidth part is selected from the plurality of activated bandwidth parts in accordance with a predetermined prioritization scheme.
6. A communications device according to claim 1, wherein the controller is configured to control the receiver so that the communications device is operable to receive an indication indicating that beam failure indications are to be transmitted using communications resources associated with the selected second bandwidth part.
7. A communications device according to claim 1, wherein the second selected bandwidth part is selected from the plurality of activated bandwidth parts in accordance with a predetermined prioritization scheme.
8. A communications device according to claim 1, wherein the beam failure indication comprises an indication of an identity of the first bandwidth part.
10. A communications device according to claim 1, wherein the beam failure criteria associated with each of the plurality of activated bandwidth parts are the same.
11. A communications device according to claim 1, wherein the beam failure criteria associated with the first bandwidth part differs from beam failure criteria associated with the selected second bandwidth part.
12. A communications device according to claim 1, wherein the first bandwidth part and the second bandwidth part are the same bandwidth part.
13. A communications device according to claim 1, wherein the first bandwidth part and the second bandwidth part are different bandwidth parts.
17. A method for a communications device for use in a wireless communications network according to claim 15, wherein one of the plurality of activated bandwidth parts is designated as a primary bandwidth part which is activated while at least one other bandwidth part is activated and the first bandwidth part is the bandwidth part designated as the primary bandwidth part.
18. A method for a communications device for use in a wireless communications network according to claim 15, wherein each of the plurality of activated bandwidth parts is either a default bandwidth part having a highest activation priority or a non-default bandwidth part having an activation priority which is lower than the activation priority of a default bandwidth part, and the first bandwidth part is the default bandwidth part.
19. A method for a communications device for use in a wireless communications network according to claim 15, wherein the first bandwidth part is selected from the plurality of activated bandwidth parts in accordance with a predetermined prioritization scheme.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
September 4, 2019
September 27, 2022
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